All categories

3 years ago

How many neutrons are contanied in Tantalum-181?

Chemistry

1 answer:

Tems11 [23]3 years ago

7 0

Answer:

A 108

Explanation:

I'm sure about the answer:)

You might be interested in

A 32.8 g sample of gas occupies 22.414 L at STP. What is the molecular weight of this gas?

olasank [31]

Answer:

32.8g/mole

Explanation:

Given parameters:

Mass of sample of gas = 32.8g

Volume = 22.4L

Unknown:

Molecular weight = ?

Solution:

To solve this problem we must understand that at rtp;

1 mole of gas occupies a volume of 22.4L

Number of mole of the gas = 1 mole

Now;

Mass = number of moles x molecular weight

molecular weight = $\frac{mass}{molecular weight}$ = $\frac{32.8g}{1mole }$ = 32.8g/mole

8 0

3 years ago

Cuales son los símbolos para representar que una reacción se produce en presencia de;

ycow [4]

Answer:

Explanation:

3 0

2 years ago

at what temperature will a fixed amount of gas with a volume of 175 L at 15 degrees celsius and 760mmHg occupy a volume of 198L

Jlenok [28]

Answer: The temperature when the volume and pressure has changed is 274 K

Explanation:

To calculate the pressure when temperature and volume has changed, we use the equation given by combined gas law. The equation follows:

$\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}$

where,

$P_1,V_1\text{ and }T_1$ are the initial pressure, volume and temperature of the gas

$P_2,V_2\text{ and }T_2$ are the final pressure, volume and temperature of the gas

We are given:

$P_1=760mmHg\\V_1=175L\\T_1=15^oC=[15+273]K=288K\\P_2=640mmHg\\V_2=198L\\T_2=?K$

Putting values in above equation, we get:

$\frac{760mmHg\times 175L}{288K}=\frac{640mmHg\times 198L}{T_2}\\\\T_2=274K$

Hence, the temperature when the volume and pressure has changed is 274 K

8 0

3 years ago

Read 2 more answers

First to answer correctly gets brainleist

LenaWriter [7]

Answer:

c. Waxing crescent

- I hope this helps have a great night

3 0

2 years ago

Lead glass contains 18-40% by mass of pbo (instead of cao in regular glass). lead glass is still used industrially, but lead cry

Julli [10]

Base on my research and further investigation about the said problem, the possbile answer would be this one.

1. calculate the g of PbO in the 272 g lead crystal (19% PbO) 272 g x 19 /100 = xxx g PbO xxx g PbO/molecular mass of PbO = moles PbO
2. write and balance the equation of neutralization of PbO and sodium sulfide. PbO + sodium sulfide -> sodium oxide + lead sulfide
3. Calculate the moles of sodium sulfide that will react with the moles of PbO
4. Convert the moles of sodium sulfide to g of sodium sulfide

4 0

3 years ago